Police were called about 1:30 a.m. Saturday for reports of a man screaming that he had been stabbed, DiLuzio said. Janos was found lying on his Morton Street porch with serious injuries, DiLuzio said; a major leg artery was hit in the stabbing.

Shortly after, police were called for reports of a man and woman arguing outside a home in the 900 block of East Fourth Street, court records indicate.

Police encountered Nicholas James Bossons, 23, of the 900 block of East Fourth Street in the city, and his girlfriend fighting, documents say.

Officers tried to detain Bossons, who had blood on him, and he fought back, DiLuzio said. In the scuffle, officer Russell Lande was elbowed in the mouth, causing a split lip, he said. Lande was treated and released.

Bossons, who had a knife on him, admitted to stabbing Janos after Janos failed to deliver the $40 of cocaine that Bossons had tried to buy from him, court records say.

As the pair walked to Janos' home, Janos told Bossons that he wasn't going to sell him any drugs, DiLuzio said. Bossons told police he then pulled out the knife and stabbed Janos to keep his "street credit," DiLuzio said. Police did not recover any drugs, he said.

Bossons was arraigned on charges of attempted homicide, aggravated assault, reckless endangerment, possession of an instrument of crime and for fighting with police and assault, records state.